Blowing-engine.



PATENTEDIOGTQ so, 1906.

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J; FAWBLL. BLOWING ENGINE. APPLICATION TILED Kill 18 1903 Mikyamon 3W ANM Y zgnfmgsszs 352% THE nouns Pin-3s co., wAsnmar N, 0, c4

,PATENTEI) 001*. 30,1906.

J. FAWBLL.

' BLOWING ENGINE. APPLIOATION nun Mn. 1 8. 1903.

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PAT E NTED OCT. 30 1906.

' J. PAWELL.

BLOWING ENGINE. APPLICATION FILED MAE.18.1903.

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INVENTOR WITNESSES:

JOSEPH FAWELL, OF PITTSBURG, PENNSYLVANIA.

BLOWING-ENGINE.

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Specification of Letters Patent.

I Patente d 39,1906, V

Application filed March 13,1903. Sale No. 148,372.

the blowing-cylinder by leakage through the outlet-port thereof, and-a consequent shifting of the pistons of the blowing-cylinder and the steam-cylinder.

The invention is hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 illustrates diagrammatically a pair of blowing-cylinders and operating-engines with connections from the ends of the blowing-cylinders to a central point. Fig. 2 is a sectional view of a portion of a blowing-cylinder, showing relief-valve device connected by a tube. Fig. 3 is a top plan view of a portion of the blowing engine. Fig. 4 is a sectional plan view on a plane indicated by the line IV IV, Fig. 3 and Fig. 5 is a view, partly in plan and partly in section, of the blowing-cylinder and its connections on an enlarged scale.

In the practice of my invention the blowing-cylinder 1 and itspiston 2 and the valves 3 and 4, controlling the in and out flow of air to and'from the cylinder, are constructed in the usual or any suitable manner. A suitable form or construction of valve mechanisn forcontrolling the inflow of air consists of a grid 4, movably mounted upon a seat 5, having radial slots or ports 5 therethrough communicating with the interior of the blowing-cylinder. This grid is adapted to be shifted on its seat to open and close the ports 5 by suitable actuating mechanism operated from the power-shaft of the engine and connected to the grid by the rod 6. A springseated valve 3, of anyusual or suitable form of construction, is employed for controlling the outflow of air from the cylinder into a chamber formed in the head or other suitable reservoir containing air under pressure, a suitable form of construction of outlet-valve mechanism being shown and described in Letters Patent N 0. 632,490, granted September 15, 1899, to J. Hemphill. It sometimes happens that a piece of dirt otherjforeign material will prevent. the outflow valve 3 from firmly closing on. its seat, and. hence When the engine is at restthere will be aleakage, and consequent accumulationof airllnder pressure at theend of the cylinder having the inlet;valve vclosed This pressure. accumulates sufiiciently to force the pistonback: ward and through it eifectinga corresponding movement of the piston of the steam-engine. In order. to prevent such an accumulation of air under pressure, escape-ports 7 are provided leading from the ends of the cylinder and provided with a valve mechanism normally held in closed position, so as to prevent any leakage from the cylinder through such port during the operation of the engine. Such a valve mechanism is arranged at each end of the blowing-cylinder and suitable connections are employed extending from such valve mechanism to a convenient pointas,

for example, the throttle-valve of the steamengineso that when the blowing-engines have been stopped these connections can be operated so as to open the valves and allow escape of pressure from the ends of the cylinders. A convenient construction of valve mechanism is shown in Fig. 2, and consists of a case or shell 8, having an outlet-port 9, arranged on one side of a diaphragm 8 through which is formed an opening adapted to be closed by a valve 10. This valve 10 is provided with a piston 11, fitting within the shell, the outer end of which has a valved connection with the pressure-reservoir 12, connected to the blowing-engine or to other suitable source of fluid under pressure. During the operation of the blowing-engine this valve connection is opened, so that the valve 10 will be held to its seat by a fluid-pressure equal or approxin ately equal -to pressure within the blowing cylinder. While the valve 10 rr-ight be opened by pressure accu mulating in the blowing-cylinder, it is preferred to' effect such opening movement by springs 13.

For convenience of operation the cases or shells of release-valve n echajnisn's 8 are connected by pipes 14, leading to avalve Irechanism 15, located at a convenient pointas, for example, a point near the throttle-valve of the steam-engine. This valve 11' echanism 15 is also connected by a pipe 16 to a reservoir containing air under pressure. As soon as the engineer closes the throttle-valve of the engine he releases by a shifting of the valve 15 the fluid-pressure in these pipes 14 and release-valve mechanisms 8, permitting the leakage-controlling valves 10 to open and permit the escape of any fluid under pressure which may flow into the blowing-cylinders When the blowing-engines are to be started, the valve mechanism 15 is shifted, so that pressure will flow into the cases or shells 8 and close the valves 10.

I claim herein as my invention 1. The combination of the cylinders of a blowing-engine, provided with leakage-ports, leakage-valves connected to said ports and adapted to be closed by fluid-pressure generated by the operation of the blowing-engine, and a valved connection controlling the fiow of fluid-pressure to said valves, substantially as set forth.

2. The combination of a cylinder of a blowing-engine provided with ports at or near its ends, leakage-valves connected to said ports and adapted to be closed by fluid-pressure generated by the operation of the en 'ine, springs for opening said valves, and a valved connection from said valves to the source of fluid-pressure, substantially as set forth.

In testimony whereof I have hereunto set JOSEPH FAWELL. Witnesses W. H. MOFADDEN, F. E. GAITHER.

my hand. 

